VIII. STEP 8 — MAKE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNITS
The thermostat is wired between the indoor and outdoor units to make the system complete.
A. Check AccuRater Metering Device
The correct AccuRater (bypass type) refrigerant control is required for system capacity optimization. An AccuRater device (see Fig. 19) is supplied with the outdoor unit. Refer to Tables
Piston style as shown in Fig. 19 is shipped with the unit. Do not interchange components between the AccuRater device types.
B. Cooling Only Systems
The following connections must be made to the outdoor unit for it to operate as a system with the indoor unit:
Route 2 wires of
C. Heat Pump Systems
The following connections must be made to the outdoor unit for it to operate as a system with the indoor unit:
Route 5 wires of
to Y, R to R, O to O, W2 to W2, and C to C with the wires. See Fig. 21.
The heat pump unit uses a timed defrost method. The timed defrost can be field set for 30, 50, or 90 minutes. The timed defrost is factory set for 90 minutes.
